Disassembly Flow - Brother HL 1240 - B/W Laser Printer Service Manual

INDEX
3
3 patterns print mode ..............................6-46
4
4% density pattern print mode.................6-46
A
AC cord .....................................................4-3
AC inlet ASSY .........................................4-27
AC power inlet ...........................................1-3
address error ...........................................6-22
Advanced Photoscale Technology ............1-2
Alarm LED ...............................................2-14
all black....................................................6-27
APT............................................................1-2
ASIC ..........................................................3-5
B
bar code ....................................................1-2
base plate................................................4-25
BD failure.................................................6-20
black band ...............................................6-36
black horizontal stripes............................6-30
black spots ..............................................6-36
black vertical streaks ...............................6-29
black vertical streaks (in a gray background)
.............................................................6-30
blurred horizontal stripes .........................6-30
blurred vertical streaks ............................6-29
BUS error ................................................6-22
C
cassette cover film.....................................4-5
cassette pressure roller ..................3-17, 4-6
circumference........................................... A-3
cleaner.....................................................3-21
cleaner spring..........................................4-22
cleaning .....................................................5-5
completely blank......................................6-26
component.................................................2-2
condensation .............................................6-1
connection diagram ......................... A-16 - 17
consumable parts .............................. 5-1, 6-1
continuous grid pattern print mode ......... 6-46
control panel ............................. 1-3, 1-5, 2-13
control panel button ................................ 2-15
corona wire .................................... 3-17, 3-21
COVER OPEN.......................................... 6-6
cover sensor ........................................... 3-20
CPU .......................................................... 1-4
CPU Runtime Error.......................... 6-5, 6-22
creases ................................................... 6-12
curl .......................................................... 6-13
D
dark ......................................................... 6-25
Data LED ................................................ 2-14
demo printer............................................ 6-45
development roller ......................... 3-17, 3-23
diameter....................................................A-3
dimensions................................................ 1-5
dirt on the back of paper ......................... 6-28
disassembly
flow ........................................................ 4-2
double feeding ........................................ 6-12
downward fogging of solid black............. 6-38
DRAM ....................................................... 3-9
D-RAM Error ............................. 6-5, 6-7, 6-22
drive unit ................................................. 4-15
drum counter............................................. A-5
Drum LED ............................................... 2-14
drum unit................................................... 4-3
cleaning ........................................ 5-5, 6-35
ground contact .................................... 6-41
life............................................1-4, 5-1, A-6
E
economy mode ......................................... 1-2
EEPROM ................................................ 3-12
effective printing area ............................... 1-8
eject pinch rollers.................................... 4-24
eject sensor lever........................... 3-17, 3-20
electrical terminal
cleaning ................................................. 5-6
emulation ........................................... 1-2, 1-4
engine interface ...................................... 3-14
engine PCB........................... 3-14, 3-18, 4-29
circuit diagram..................................... A-25
i
INDEX